Mitsubishi Electric MELSERVO-J4 Series Transition Handbook page 64

Part 2: Review on Replacement of MR-J3-_A_ with MR-J4-_A_
MR-J3-_A_
No. Name and function
PA15 Encoder output pulse
Turn off the power and then on again after setting
the parameter to validate the parameter value.
Used to set the encoder pulses (A-phase, B-phase)
output by the servo amplifier.
You can use parameter [Pr. PC19] to choose the
output pulse setting or output division ratio setting.
The number of A/B-phase pulses actually output is
1/4 times greater than the preset number of pulses.
The maximum output frequency is 4.6 Mpulses/s
(after multiplication by 4). Use this parameter within
this range.
(1) For output pulse designation
Set "_ _ 0 _" (initial value) in [Pr. PC19].
Set the number of pulses per servo motor
revolution.
Output pulse = set value [pulses/rev]
For instance, set "5600" to [Pr. PA15], the
actually output A/B-phase pulses are as
indicated below.
A/B-phase output pulses =
(2) For output division ratio setting
Set "0 0 1 0" in parameter [Pr. PC19]
The number of pulses per servo motor revolution
is divided by the set value.
Resolution per servo motor revolution
Output pulse
For instance, set "8" to [Pr. PA15], the actually
A/B-phase pulses output are as indicated below.
A/B-phase output pulses=
(3) When outputting pulse train similar to command
pulses
Set [Pr. PC19] to "_ _ 2 _". The feedback pulses
from the servo motor encoder are processed and
output as shown below. The feedback pulses can
be output in the same pulse unit as the command
pulses.
Feedback pulse
[Pr. PA05]
"0" (Initial value)
FBP
Other than " 0"
5600
= 1400 pulses
4
[pulses/rev]
Set value
262144 1
・
= 8192 pulses
8 4
Servo motor
M
Encoder
[Pr. PA06]/[Pr. PA07]
CDV
CMX
A/B-phase
output pulses
Pt
Initial
No.
value
4000 PA15 Set the encoder output pulses from the servo
amplifier by using the number of output pulses per
revolution, dividing ratio, or electronic gear ratio.
(after multiplication by 4)
To set a numerator of the electronic gear, select "A-
phase/B-phase pulse electronic gear setting (_ _ 3
_)" of "Encoder output pulse setting selection" in [Pr.
PC19].
The maximum output frequency is 4.6 Mpulses/s
(after multiplication by 4). Use this parameter within
this range.
Setting range: 1 to 4194304
PA16 Set a denominator of the electronic gear for the A/B-
phase pulse output.
To set a denominator of the electronic gear, select
"A-phase/B-phase pulse electronic gear setting (_ _
3 _)" of "Encoder output pulse setting selection" in
[Pr. PC19].
Setting range: 1 to 4194304
2 - 29
MR-J4-_A_
Name and function
Control
Initial
mode
value
4000 P
S
T
1 P
S
T